Throttle valve construction



Dec. 1, 1931. M. RlvKlN 1,834,858

THROTTLE VALVE CONSTRUCTION Filed sept. 25, 1929 4 sheets-sheet 1 Dec. 1, 1931. I M, RNKIN 1,834,868` THROTTLE VALVE CONSTRUCTION L Filed Sept. 25, 1929 4 Sheets-Sheet 2 Dec. l, M, RlvKlN THROTTLE VALVE CONSTRUCTION Filed sept; 25, 1929 4 Sheets-Sheetl 3 mit..

Dec. 1, 1931. M. RlvKlN THROTTLE VALVE CONSTRUCTION Filed Sept. 25, 1929 4 SheetS--Sheel 4 Patented Dec. A1, 1931 UNITED STATES PATENT :OFFICE THROTTLE VALVE CONSTRUCTION Application led September 25,1929.

One object of my invention is to locate `the throttle valve of a locomotive in a cylinder structure. V y

A further object of the invention is to reduce the number of joints in the steam line to a minimum, and to eliminate a separate casting for the casing of the valve.

A still further object is to so locate the valve in the cylinder structure at the front of the smoke-box that access can be readily had to it when adjustment or repairs are necessary. The invention also relates to the particular construction of the valve.

In the accompanying drawings:

Fig. lis an end view partly in section illustrating my improved throttle valve located in a cylinder casting of a locomotive, in which the steam pipes lead from the dry pipe or superheater;

Fig. 2 is a sectional plan view on the line 2 2, Fig. 1;

Fig. 3 is a sectional elevation on the line 3-3, Fig. 1;

Fig. lis an enlarged sectional view of the ythrottle valve shown in 1;

Fig. is a plan view of the valve;

Fig. 6 is a detached plan View of the inner section of the valve;

VIig. 7 is a detached plan vien7 of the ring; an

Figs. 8 and 9 are views illustrating modifications of the valve..

Referring to the drawings, 1 is a cylinder casting of any suitable type in the present instance, having cylinders 2-2 and steam chests 3 cast integral with the saddle 4. In the saddle are the steam supply passa-ges 5 leading from the steam pipes 6 which are connected at their upper ends to a superheater header (ia or to the dgy pipe of the locomotive. The boiler 7 is shown by dotted lines.

While tWo steam pipes are shown, in some instances a single steam pipe may be used Without departing from my invention.

vouter section of the valve, lifting said section Serial No. 395,098.

iThe cylinder structure 1 is an integral casting, and in the casting is a partition 8 separating the live steam intake chamber 9 from the passages 10 leading to the steam chests 3-3. In the partition 8 is an opening 1l in which is iitteda seat ring l2 in the present instance for the main section 18 of the throttle valve 14:. 7

` On the stem 1G is a pilot valve 17 which is adapted to a seat 18 on the inner Avalve section of the throttle valve. The valve section 15 is adapted to a seat 19 on the main section 13. On the stem is a nut 20 which can be .adjusted so as to raise the second section after the pilot valve 1 7 is opened.

The lower end 2l of the inner section 15 is located in a chamber 22 formed in the hub 23 oic a ring section 24-7 so that when thepilot vvalve is raised ofi" itsseat, steam admitted to the interior of the inner section 15 Will act to balance the inner section of the valve so that it can be raised ofi its seat without effort; and as they movement of the stem continues the ring 24 will engage the shoulder 25 on the off itsseat. Then the valve is closed., any steam remaining in the inner section 15 Will escape through the space between the hub 23 and the stem and through the radial passages 26.

l' The stem 16 is guided at its lower end in a bushing 27 located in a cavity in the cylinder casting, and the upper end of the stem is guided in a bushing 2S in cover plate 29 80 which closes the top of the valve chamber 9. On detaching this cap plate the entire valve can be removed when necessary.

TheL valve 14- in the present instance is operated by a rod 4l() extending to the cab of the locomotive and connected to an arm 30 on a shaft 31v Which extends through a stuffing box 32 in the cylinder casting. On the end of the shaft 31, is an arm 33 bifurcated in the present instance and adapted toJ span the 'valve stein, being secured to the stem by a pivot pin 34.

The arm 33 is so located that When it is detached from the valve stem it drops `into a cavity 35 back of the line of the valve so that it Will not obstruct the removal of the valve. The bottom ot the cavity for the loWer bushingv 27 is drained by a drain pipe 36,

rWhich in the present instance leads into the steam passage 10.` y

In Figs. l and Qthe throttle is located at the forward end of the saddle in front of the exhaust nozzles 37.' This arrangement alpassage above the passage leading to the steam chests; a horizontal partitionseparating the two passages; an opening in the partition; a throttle valve located in the :opening; a stem for thev valve having upper and lower bearings in the structure; a horizontal shaft; an arm on the shaftV connected to the valve; a second arm on the shaft on the outside of the structure; and a rod connected to the arm and extending to the cab of the loco-k motive. v

. MENAHEMRIVKIN.

lovvs for easy access to the throttle valve vvithout disturbing other part'sof the mechanism.-

Within the smoke-box of the locomotive, but infsome instances Where necessary the valve may be located back of the exhaust nozzles Without departing from the Iessential `teatures of the invention. drain pipe 38, provided or the valve chamber 9 as shown in Eig. 3, and a valve control the tlovv of Water of condensation from y.this chamber. The

'valve may be operated vvvith the cylinder cocks or independently, as desired. A In Fig. 8 is 'shown a modification of the valve shown in F ig. t. The inner section 15a I i of the vvalve is raised by the stem 16a through the ring 24a. Thering alsolifts the Aouter V' section 13a ofthe valve. The steam entering the inner sectionv la'vvhen the pilot valve is i raised escapes through lateral passages 39.

Fig. 9 illustrates a slight. modification ofy the valve shovvnin Fig. 8v. The inner section and the ring are independently mounted on the stem..V I claim: l

p l.. The combi'nation in a cylinder vstructure having cylinders therein, steam chests, and

passages leading tothe steamqchestsof a live steam passage leading to a valve" eham# ber; .a partition separating the valvechainber from the passages leading tothe valve chests; an opening m the partition; la valve seat located in the opening; athrottle valve mounted on the seat; a stem for actuating the throttle valve a stuiing-box formed integral With the cylinderA casting;fand means vfor moving the stem. Y Y n V2. The combination lin a cylinder structure having Vcylinders therein.; steam chests and passages leading to the steam chests; alive each -cylindefrypassages leading from a cen- Y tralrpoint to :the ysteam chests; 'alive steam 

